(Australia, colloquial) A urinal cake.

(rail transport, UK) a long trough placed between the rails in a railway track, which enabled a steam locomotive to replenish its water supply without stopping by lowering a scoop. They were removed at the end of steam train operation.

a valley that resembles the letter U

plural of trough shell

Any clam of the family Mactridae.

Alternative form of winetrough

A feature in astronomical spectrometry of distant light, caused by the Reionization Era's absorption of UV light, leaving a gap in the spectrum.

plural of troughful